AirHint found the following cheapest return flights from Lille (LIL) to Porto (OPO) in July 2025 (see full year).

Return flights

20 Jul - 25 Jul	Volotea
16 Jul - 21 Jul	Volotea
21 Jul - 25 Jul	Volotea
18 Jul - 25 Jul	Volotea
28 Jul - 04 Aug	Volotea
14 Jul - 21 Jul	Volotea
14 Jul - 18 Jul	Volotea
28 Jul - 01 Aug	Volotea
18 Jul - 21 Jul	Volotea
15 Jul - 18 Jul	Ryanair
11 Jul - 18 Jul	Volotea
28 Jul - 30 Jul	Ryanair
28 Jul - 04 Aug	Ryanair	direct
28 Jul - 01 Aug	Ryanair	direct
31 Jul - 04 Aug	Volotea
29 Jul - 01 Aug	Ryanair
25 Jul - 04 Aug	Ryanair	direct
25 Jul - 01 Aug	Ryanair	direct
28 Jul - 08 Aug	Volotea
21 Jul - 04 Aug	Ryanair	direct

Also check the deals for one-way flights from Lille to Porto in July.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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Cheapest return flights from Lille to Porto in July from $206

Return flights